issue in installing mysql2 gem with rails3 on mac

Question

 Installing mysql2 (0.2.6) with native extensions /Library/Ruby/Site/1.8/rubygems/installer.rb:483:in `build_extensions\': ERROR: Failed to build gem native extensio         


        

Answer 1

Try the following, which seems to have worked for others:

1. From the Terminal, run locate mysql_config and identify the path to the mysql_config binary
2. Use that path in the following command to install the gem:sudo gem install mysql2 -- –with-mysql-config=/path/you/identified/above/mysql_config

[Edit]

In response to the new error, e.g.:

Mohit-Jains-MacBook-Pro:casecreed mohit$ rake db:create
(in /Users/mohit/projects/casecreed)
rake aborted!
dlopen(/Library/Ruby/Gems/1.8/gems/mysql2-0.2.6/lib/mysql2/mysql2.bundle, 9): Library not loaded: libmysqlclient.16.dylib
  Referenced from: /Library/Ruby/Gems/1.8/gems/mysql2-0.2.6/lib/mysql2/mysql2.bundle
  Reason: image not found - /Library/Ruby/Gems/1.8/gems/mysql2-0.2.6/lib/mysql2/mysql2.bundle
/Users/mohit/projects/casecreed/Rakefile:4
(See full trace by running task with --trace

I believe this is due to mysql2 not using the full path to libmysqlclient.16.dylib. Others have had luck with:

sudo install_name_tool -change libmysqlclient.16.dylib /usr/local/mysql/lib/libmysqlclient.16.dylib /Library/Ruby/Gems/1.8/gems/mysql2-0.2.6/lib/mysql2/mysql2.bundle

However, be sure to replace /usr/local/mysql/lib/libmysqlclient.16.dylib with the path to your own libmysqlclient.16.dylib. I'm not positive what it would be, but you may be able to find it with locate (if not, check around in the lib directory for /usr/local/mysql-5.5.9-osx10.6-x86_64).